Music-leaf turner.



J. W. BOLTZ.

MUSIC LEAF TURNER.

APPLICATION FILED APR.25, 1912.

Patented July 15, 1913.

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J. w. BOLTZ MUSIC LEAF TURNER.

APPLICATION IILED APR.26, 1912.

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Wilnesses Inventor COLUMBIA PLANOORAPH COUWASHINGTOPL n. C.

Patented July 15, 1913.

UNITED STATES PATENT QFFICE.

JACOBW. BOLTZ, OF TOPEKA, KANSAS.

MUSIC-LEAF TURNER.

To all whom 2'25 may concern:

Be it known that I, JACOB W. 130132, a citizen of the United States,residing at T0- peka, in the county of Shawnee and State of Kansas, haveinvented certain new and useful Improvements in Music-Leaf Turners, ofwhich the following is a specification.

The object of my invention is to provide a simple, eflicient, durable,and economical music leaf turner, that is simple in operation and notlikely to get out of order.

It comprises a stationary frame in which is mounted a threaded shaft,the thread or threads of the shaft engaging a pin or pins in the frameso that the shaft moves lengthwise as it is rotated, a series of hubsmounted on the shaft, each hub carrying an arm,

the webs of the hubs being spaced apart from each other and each havinga key-way, and a key secured to the shaft and adapted to engage in saidkey-ways as the shaft is rotated, so as to turn said hubs and therespective arms a half-turn each in succession.

My invention further relates to the details of construct-ion of theshaft, frame, and hubs; also to the details of the arms, as willhereinafter be more fully set forth.

In the drawings accompanying and forming part of this specification andin the de scription of the drawings, I have shown my invention in itspreferred form, and have shown what I deem to be the best mode ofapplying the principles thereof; but it is to be understood that, withinthe scope of the appended claims, I contemplate changes in form,proportions, and materials, the transposition of parts, and thesubstitution of equivalent members, without departing from the spirit ofmy invention.

Figure 1 is an elevation of a music leaf turner made in accordance withthe prin' ciples of my invention, two of the arms being broken away inpart. Fig. 2 is a sectional elevation through the line 2 in Fig. 1. Fig.3 is an enlarged sectional elevation of the principal operatingmechanisms on the line 3 in Figs. 2, 6, and 7. Fig. 4 is a view of themeans for attaching the upwardly extending fingers to the arm, on theline 4 in Fig. 3. Fig. 5 is a sectional view of the clasp on the line 5in Fig. 3. Fig. 6 is a face view of one of the hubs, showing also theshaft, key, and part of the arm, taken approximately on line 6 in Fig.3. Fig. 7 is a sectional View of the hub on the line 7 in Fig. 6. Fig. 8is a sectional eleva- Specification of Letters Patent.

Application filed April 25, 1912.

Patented July 15,1913.

Serial No. 693,060.

tion of the hubs with ball bearings therebetween.

Similar reference characters indicate similar parts throughout theseveral views.

9 is a plate of any suitable size, shape, and material, in the lower endof which are two bearings 10 and 11, the latter of which has one or twopins 12, 12 adapted to engage in the thread or threads of a shaft 13,which is mounted on said bearings.

14, 15, 16, and 17 are a number of hubs mounted loosely in succession onsaid shaft between the two bearings, said bearings being rotatable onthe shaft and in the frame but having no movement in the framelengthwise of the shaft, their engaging faces having ribs 19 and grooves20.

21 is a key secured to the shaft, and 22, 22 are key-ways in the webs ofthe respective hubs for the reception of the key. As shown in thedrawings the webs are spaced apart from each other, preferably adistance slightly wider than the key, and the keyways are wider than thethickness of the key; also it should be noted that the threads are sorelated to the webs of the hubs that a half-turn of the shaft causes theshaft to be moved lengthwise a distance equal to the distance fromcenter to center of adjacent hubs. For instance, assuming the hubs to beone-quarter inch thick, the thread should be two-to-the-inch, so that ahalf turn of the shaft will move the shaft lengthwise from one hub tothe next hub, in similar positions with respect to the planes of the respective hubs. If the shaft be turned, from,

position shown in Fig. 3, to the right, the key will enter the key-wayin hub 15 and during a halfturn will pass through said key-way whileturning that hub with it, and will be released therefrom at the end ofthe half-turn. Continuing turning to the right, the hub 14 will bepicked up for a half-turn. By turning to the left, the hubs willsimilarly be turned each a half-turn to the left in succession. The keystrikes against the bearings at the ends of its lengthwise travel andbecomes locked against further travel than through the respective hubs14 and 17 The turning of the shaft may be effected by any suitablemeans, as by cords 24, 25 wound in different directions upon the sheave23 secured to the lower end of the shaft; whereby the shaft may beturned to the right or the left by pulling the cords 24 or 25respectively. Or the shaft may be pulled or pushed lengthwise, in whichlatter case, the rotary movement will automatically accompany thelengthwise movement.

Projecting from the periphery of each hub are two lugs 26 between whichis pivoted an arm 27, which may be folded up parallel with the shaft, asindicated at 28, but which has a stop 29 to prevent it from fallingbelow its outstanding position substantially at a right angle to theshaft.

30 is a bracket embracing the arm, and. 31, 31 are two fingers pivotedtothe bracket at 32, the lower ends of the fingers being squared, as shownat 33, and bearing against a spring 34, whose ends are enlarged and bearagainst the arm, as shown at 35. The purpose of the enlargement is tohold the spring within the bracket. The fingers may be turned together,either inwardly or outwardly substantially parallel with the arm, asindicated at 36. The two fingers are not riveted or otherwise rigidlysecured together, but each may be turned on the pivot 32 independentlyof the other; for instance, where it is desired to use only the fingerwith the clasp next described, the other finger may be turned inwardlyand out of the way.

37 is a clasp of any suitable kind secured to one of the fingers, itspurpose being to clasp the music leaf, especially where the leaves areshort. However, the fingers themselves are preferably made of springmetal and tend naturally to bear against each other, so that the leafmay be placed between the fingers.

38 is a tube for projecting the threaded end of the shaft from view andinjury.

40, 10, 40 are three supports secured to the plate about in line withthe shaft for the purpose of supporting the music at the fold, and 4:3,413 are two arms to prevent the sheets from slipping downward.

41 and 42 are hooks at the top and bottom respectively, and about on thecenter line of the plate, their purpose being that when the music islaid on the frame with the fold along the supports, a rubber band 39 maybe laid over and lengthwise of the fold and secured to the hooks, forthe purpose of holding the music in place while the leaves are beingturned.

It will now be understood-that when the music is laid upon the rack, thearms are all turned to the right, and the fingers or clasps secured tothe respective leaves, the rubber band being applied as indicated. Thenby intermittent operations of the shaft the leaves may be turned. Itwill also'be noted that by turning the fingers to the'position indicatedby 36, and then the arms to position indicated by 28, the device may befolded up within. small compass. The brackets 30 may be slippedlengthwise on each arm. They will slip easily and freely when thefingers are turned down and the tension of the spring released; and whenthe fingers are upturned again, they will be held firmly againstaccidental slipping.

In Fig. 8 I have shown thehubs, here indicated as 1 1, 15, 1G, and 17,with ball bearings 18 between adjacent hubs, to eliminate friction andmake the device work easier and freer.

l Vhat I claim is:

1. A. leaf turner having, in combination, a'frame, a shaft mountedtherein, a series of outwardly extending arms mounted on the shaft,means between the shaft and the arms for imparting oscillatory motion tothe arms, a bracket slidably mounted on each arm, an upwardly extendingfinger pivoted to the bracket and having a squared end within thebracket, and a spring between said end and the arm, the squared endbeing on a longer radius from the pivot than the side of the finger.

2. A leaf turner having, in combination, a frame, a shaft mounted in andhaving screw-threaded engagement with the frame and having a key rigidlysecured thereto, a series of hubs mounted loosely and successively onthe shaft, each hub having a web and a key-way therein for said key, theframe being formed to hold the hubs against lengthwise movement, and thethreading being of such pitch and the key and key-ways of such lengththat the key engages in one key-way during a half rotation of the shaftcausing the hub having such key-way to make substantially a halfrotation with the shaft, and the continued rotation of the shaft causesthe key to pass from that key-way to the adjacent key-ways successively,turning each hub in succession a half rotation.

8. A leaf turner having, in combination, a frame, a shaft mounted in andhaving screw-threaded engagement with the frame and having a key rigidlysecured thereto, a series of hubs mounted loosely on the shaft, theframe being formed to hold the hubs against lengthwise movement, thehubs having key-ways for said key, said keyways being arrangedalternately on diametrically opposite sides of said shaft, thescrewthreading being of such pitch as to move the key through onekey-way during a half rotation of the shaft, and adjacent keyways havinga clearance to permit the key, on continued rotation of the shaft, topass from key-way to key-way successively turning each hub a halfrotation.

4. A music leaf turner having, in combination, a frame, a series ofsupports thereon to support the music at the fold, a hook at each end ofthe frame in line with'the supports, a shaft having threaded engagementWith'the frame and having bearings therein substantially in line withsaid supports, and said shaft having a key, a series of hubs mountedlooselv on said shaft be tween said bearings and having no lengthwisemovement between said bearings, said hubs being arranged contiguously toeach other in succession, and each hub having a Web and a key-way insaid web for said key, said key-ways being arranged alternately ondiametrically opposite sides of said shaft, and said key extendinglengthwise of the shaft a distance not greater than the thickness(measured lengthwise of the shaft) of a hub, and the threading being soarranged that a half rotation of the shaft moves the shaft and keylengthwise a distance equal to such hub thickness, whereby said key,upon rotation of the shaft, engages successively in the respectivekey-ways and moves said hubs successively a half rotation each; an armsecured to each hub and tending outwardly therefrom, a pair of fingerssecured to each arm and bearing toward each other, and a clasp securedto one of said fingers in each pair.

5. A leaf turner having, in combination, a frame, a shaft havingthreaded engagement with the frame and having a key, a series of hubsloosely mounted on the shaft and held by the frame against lengthwisemovement and each hub having a key-way for said key, said key-ways beingarranged alternately on diametrically opposite sides of the shaft, saidkey extending lengthwise of the shaft a distance not greater than thedistance from center to center of adjacent hubs, and the threading beingof a pitch one-half of which is equal to such distance from center tocenter of adjacent hubs, whereby said kev is adapted to engagesuccessively in the key-ways of the respective hubs as the shaft isrotated and consequently by reason of its threaded engagement with theframe moved lengthwise from hub to hub, causing each hub to make insuccession a partial rotation; each hub having an outwardly-extendingleaf-engag mg arm. 1

6. A leaf turner having, in combination, a frame, a shaft mounted in andhaving screw-threaded engagement with the frame to give said shaft bothlengthwise and rotary motion in said frame, a series of hubs mountedloosely and successively on said shaft, said frame being arranged tohold the hubs against lengthwise movement, said shaft having a key thatextends lengthwise of the shaft a distance not greater than the distancefrom center to center of adjacent hubs, and the pitch of thescrew-threading being approximately double said distance; each hubhaving a keyway for said key, and said key-ways being arrangedalternately on diametrically opposite sides of the shaft; whereby therotation of the shaft moves said key from hub to hub bringing the keyinto the key-ways successively, said key engaging in each key-wayapproximately during a half-turn of the shaft and thus imparting to eachhub successively a half-turn.

7. A leaf turnerhaving, in combination, a frame, a shaft mounted in andhaving screw-threaded engagement with the frame and having a key rigidlysecured thereto, a series of hubs loosely mounted on the shaft, theframe being formed to hold the hubs against lengthwise movement, eachhub having a key-way for said key, said key-ways being arrangedalternately on diametrically opposite sides of the shaft, the rotationof the shaft causing lengthwise movement thereof by reason of saidscrew-threaded engagement with the frame and such lengthwise movementbringing the key into en gagement with the respective key-wayssuccessively, and said key and said key-ways being respectively of suchlengths (measured lengthwise of the shaft) that the key engages witheach key-way during substan tially a half rotation of the shaft.

In testimony whereof I have affixed my signature in presence of twowitnesses.

JACOB WV. BOLTZ. Witnesses:

JOSEPH GRoLL, OLIVER LANE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

